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Database Errors Interview Questions
Questions Answers Views Company eMail

ORA-02434: cannot enable unique(string) - unique key not defined for table

1 8997

ORA-02435: cannot disable unique(string) - unique key not defined for table

1 3456

ORA-02436: date or system variable wrongly specified in CHECK constraint

1 4793

ORA-02437: cannot validate (string.string) - primary key violated

1 8702

ORA-02438: Column check constraint cannot reference other columns

1 8093

ORA-02439: Unique index on a deferrable constraint is not allowed

1 3927

ORA-02440: Create as select with referential constraints not allowed

1 3286

ORA-02441: Cannot drop nonexistent primary key

1 13324

ORA-02442: Cannot drop nonexistent unique key

1 4223

ORA-02443: Cannot drop constraint - nonexistent constraint

1 19787

ORA-02444: Cannot resolve referenced object in referential constraints

1 4827

ORA-02445: Exceptions table not found

1 4503

ORA-02446: CREATE TABLE ... AS SELECT failed - check constraint violated

1 2992

ORA-02447: cannot defer a constraint that is not deferrable

1 7438

ORA-02448: constraint does not exist

1 4834


Un-Answered Questions { Database Errors }

hi. i m Anil patel when reconcile 57f4 chalan(subcontraction with out excise)i m facing error like short by material 220 kg. even i have migo all material.

2575


if the lengths of two wires are same and the area of cross sections is 4:7 then what will be the ratio of current passing through these wires

2753


ORA-26030: index string.string had string partitions made unusable due to:

1988


RMAN-05017: no copy of datafile number found to recover

2465


I have written the code as below. here problem is that dt remain null. how to solve thst please tell me. public partial class Form1 : Form { private DataTable DTable; private DataRow drow; public Form1() { InitializeComponent(); } private OleDbConnection getConnection() { OleDbConnection con=new OleDbConnection (@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\Documents and Settings\Administrator\My Documents\Visual Studio 2008\Projects\winApp for Student\winApp for Student\App_Data\SchooMgnSystem.mdb;Persist Security Info=True"); return con; } private void button1_Click(object sender, EventArgs e) { InsertData(); } private void InsertData() { if (DTable==null) { DTable = new DataTable(); DTable.Columns.Add("StudID", typeof(string)); DTable.Columns.Add("StudName", typeof (string)); DTable.Columns.Add("Address", typeof(string)); drow = DTable.NewRow(); drow[0] = txtStudID.Text; drow[1] = txtSTudName.Text; drow[2] = txtAddress.Text; DTable.Rows.Add(drow); grdStudent.DataSource = DTable; } else { drow = DTable.NewRow(); drow[0] = txtStudID.Text; drow[1] = txtSTudName.Text; drow[2] = txtAddress.Text; DTable.Rows.Add(drow); grdStudent.DataSource = DTable; } } private void button2_Click(object sender, EventArgs e) { string cmdstr; OleDbCommand cmd; OleDbConnection con = getConnection(); foreach (DataRow Drow in DTable.Rows) { cmdstr = "Insert into Student values('" + drow[0].ToString() + "','" + drow[1].ToString() + "','"+drow [2].ToString()+"')"; cmd = new OleDbCommand(cmdstr,con); try { con.Open(); cmd.ExecuteNonQuery(); } catch (Exception ex) { MessageBox.Show(ex.Message); } finally { con.Close(); } } }

2709


IMG-02003: 2FF03 - incorrect color histogram feature specification

1762


why we are using shift key in unix shell script

3230


What severity level errors are managed in TRY-CATCH block?

2264


Hi guys, I have four tables those are emp,dept,eliminate and uneliminate. i wrote small cursor..when i run, it display one error (ORA-01403 nodata found)... The query is: Declare cursor c1 is select e.ename emp_name from emp e,dept d where e.deptno=d.deptno group by deptno; r1 c1%rowtype; test_emp varchar2(200); begin for r1 in c1 loop begin select eliminate_emp into test_emp from eliminate t,uneliminate ut where t.number=ut.number and t.deptno=e.deptno and rownum<1; end; dbms_output.put_line(r1.emp_name); end loop; end; Thanks...

2661


What is the meaning of lock escalation and why/how to stop this?

2709


NZE-28868: Peer certificate chain check failed.

2864


ORA-26094: stream format error: input column overflow

2854


mount: mount to NFS server failed: System Error: Connection timed out

3703


Hi, I am trying to encode data from flatfile and then to decode the encoded data to original form. Procedures that I followed:- 1. Encoded the field 'A_ID' using AES_ENCRYPT(A_ID,'abd') in the expression transformation. The A_ID got encoded in the output table(oracle) 2. To decode this back I used AES_DECRYPT(A_ID,'abd'). But after executing the workflow, I am not getting any data in output. can anybody tell me how to decrypt the encoded data back to original form ??

1732


ORA-26027: unique index string.string partition string initially in unusable state

6791